CarYardMIT162011 Class Implementation in Java

Task1: UML Class Diagram
Task 2: Car Class
package caryard;
public class Car {
int id;
String modelName;
int year;
double costPrice, sellingPrice;
Car(String name, int year, double costPrice){
setID();
this.modelName = name;
this.year = year;
this.costPrice = costPrice;
sellingPrice = calcSP();
}
public void setID(){
id = (int) ((Math.random() * ((1000 - 100) + 1)) + 100);
}
int getID(){
return id;
}
String getModel(){
return modelName;
}
int getYear(){
return year;
}

double getCP(){
return costPrice;
}
double getSP(){
return sellingPrice;
}
double calcSP(){
return costPrice*(1 + 0.3);
}
}
Task 3: Driver Class
package caryard;
import java.util.Scanner;
public class CarYardMIT162011 {
static Car[] cars = new Car[100];
static int carCount=0;
static Scanner sc = new Scanner(System.in);
private static void buy(){
System.out.println("\n~ Buy Car ~");
System.out.println("\nEnter model name:");
String name = sc.nextLine();
int year;
while(true){
System.out.println("Enter year:");
year = sc.nextInt();
if(year<2009)
System.out.println("\nError! The car yard does not
buy cars manufactured before 2009.");
else
break;
}
System.out.println("Enter price: $");
double price = sc.nextDouble();
cars[carCount]=new Car(name,year,price);
System.out.println("\nNew car added: "+name+" ("+year+")");
carCount++;
}
private static void display(){
System.out.println("\n~ Car List ~");
for(int i=0;i<carCount;i++){
System.out.println("\n"+(i+1)+":");
System.out.println("\n\tCar ID: "+cars[i].getID());
System.out.println("\n\tModel: "+cars[i].getModel());
System.out.println("\n\tYear: "+cars[i].getYear());
System.out.println("\n\tCost price: $"+cars[i].getCP());
System.out.println("\n\tSelling price:
$"+cars[i].getSP());
System.out.println();
}
}

private static int sell(){
System.out.println("\n~ Sell Car ~");
System.out.println("\nEnter car ID:");
int id = sc.nextInt();
for(int i=0;i<carCount;i++){
if(cars[i].getID()==id){
System.out.println("\n\tModel:
"+cars[i].getModel());
System.out.println("\n\tYear: "+cars[i].getYear());
System.out.println("\n\tCost price:
$"+cars[i].getCP());
System.out.println("\n\tSelling price:
$"+cars[i].getSP());
return 1;
}
}
System.out.println("No match found for car ID: "+id);
return 0;
}
public static void main(String[] args){
int choice=1;
cars[carCount]=new Car("Mazda",2009,15000);
carCount++;
cars[carCount]=new Car("Suzuki",2018,7000);
carCount++;
cars[carCount]=new Car("Royce",2015,12000);
carCount++;
while(choice!=4){
System.out.println("\n~ Main Menu ~");
System.out.print("1. Buy Car\n2. Sell Car\n3. Display all
cars\n4. Exit\n\nEnter menu choice... ");
choice = sc.nextInt();
sc.nextLine();
switch(choice){
case 1: buy();
break;
case 2: sell();
break;
case 3: display();
break;
case 4:
System.out.println("\nGoodbye! Have a nice day!");
break;
default: System.out.println("Wrong entry!");
}
}
}
}